Mathematics High School

A chemist has a 100 gram sample of a radioactive
material. He records the amount of radioactive material
every week for 6 weeks and obtains the data in the
table below.


look at the picture please <3 i really need this asap

A Chemist Has A 100 Gram Sample Of A Radioactivematerial. He Records The Amount Of Radioactive Materialevery

Answers

Answer 1

Answer:

75

Step-by-step explanation:

did it 5 mins ago

Related Questions

Please, help! Help! Help!

Answers

Answer:

HOW DO I ANSWER THIS

Step-by-step explanation:

Uehehejjdjdjejjejejjdjdjejejejejejjejejejeejjd

Answers

Answer:

kgkbfkbfbk3grrkmfbhrfikrk

Answer:

thank you for the free point i guess

Step-by-step explanation:

can u mark me brainlest plz

gjnrijnrtibfnsibneifn

Factor each expression completely
4x² + 6x – 40
Show your work!!!

NO LINKS PLS

Answers

Answer:

4x²+6x-40

2(2x²+3x-20) factor out 2

2(2x²+8x-5x-20) split the three into a difference

2(2x(x+4)-5x-20) factor the 2 out of first pair of parenthesis

2(2x(x+4)-5(x+4)) factor the 5 out of second pair of parenthesis

2(x+4)(2x-5) factor

= 2(x+4)(2x-5)

Step-by-step explanation:

i hope this helps :)

y = x2 + 12x + 30
8x − y

Answers

8x - x2+ 12x +30
6x+12x +30
18x +30

8x- x2 +12x +30
-4x -x2 + 30

If the x2 was a mistake ignore the second one. The first should be correct.

a 3 inch radius circle is drawn inside a 7 in radius Circle if you throw a dart at the circles what is the probability you land inside the smaller circles​

Answers

Answer:0.82

Step-by-step explanation:

The first step is to determine the areas of the inner and the bigger circles.

The formula for determining the area of a circle is expressed as

Area = πr²

Where

r represents the radius of the circle.

π is a constant whose value is 3.14

Considering the inner circle,

diameter = 148.4 cm

Radius = 3 inches

Area = 3.14 × 3² = 28.26 inches²

Considering the bigger circle,

Radius = 7 inches

Area = 3.14 × 7² = 153.86 inches²

The area between the bigger and inner circles is

153.86 - 28.26 = 125.6 inches²

Probability = number of favourable outcome/number of total outcome.

the probability you land inside the bigger circle but outside smaller circle is

125.6/153.86 = 0.82

14m to 140cm witch is more

Answers

Answer:

14 m is more

Step-by-step explanation:

14 meters = 1400 cm

14 x 100=1400

Answer:

14 m is more

Step-by-step explanation:

1 m = 100 cm

14 m

= 14 x 100

= 1400 cm

1400 cm > 140 cm

14 m > 140 cm

Find the length of each arc. Use the exact answer

Answers

Answer:

Option D = 16π/3 ft

Step-by-step explanation:

Arc length formula is written Mathematically as:

Arc length = 2πr × θ /360

r = 4 ft

θ = Central angle in degrees = 240°

2 × π × 4 × 240/360

8π × 240/360

8π × 20/30

16π/3 ft

So, the arc length is 16π/3 ft

Need help with this question

Answers

Answer:

x = 2.3

Step-by-step explanation:

Since we know all three sides, what we do here is multiply side a & b's lengths together and divide by the hypotenuse. (a + b)/c

(2.5 * 6)/6.5

Step 1: Multiply 2.5 by 6 to get 15.

15/6.5

Step 2: Convert 6.5 into a whole number by multiplying it by 10. Make sure to do that to the 15 as well.

150/65

Step 3: 150/65 simplifies to 30/13 (GCF: 5).

30/13

Step 4: 30/13 becomes 2 4/13.

2 4/13

Step 5: 2 4/13 rounds to 2.3

2.3 is the value of x.

|2a+1|=1 plz help and no link

Answers

Answer:

2a+1=1

or, 2a=1-1

or, 2a=0

or, a=0/2

or, a=2

Step-by-step explanation:

please check the answer correct or wrong

Please read short story and answer questions **50 points

Answers

Answer:

Step-by-step explanation:

A  find the main idea

M -1

N -2

B -3

1- C

2-B

3-A

4-C

5- C

Hello, I Am BrotherEye

Answer:

Is This Question Still Require My Attention?

Step-by-step explanation:

Help ASAP pls now and thank u

Answers

Answer:

A)25

Step-by-step explanation:

5 x 5 = 25

Answer:

B.......

because to work out the area of a sphere we use

4 pie (r)²

The lengths, in cm, of the sides of a triangle are 3x – 5, 2x – 1 and x + 1 (a) Write down an expression, in terms of x, for the perimeter of the triangle.

Answers

Answer: [tex]6x-5[/tex]

Step-by-step explanation:

Given

The side lengths of a triangle are  [tex]3x-5, 2x-1,\text{and}\ x+1[/tex]

Perimeter(P) is the sum of the side length of the triangle i.e.

[tex]\Rightarrow P=3x-5+2x-1+x+1\\\Rightarrow P=6x-5[/tex]

Therefore, the perimeter of the triangle is [tex]6x-5[/tex]

Which formula below belongs to this shape?
Height
Base
length + width
Length times Width
wrong answer
Width/ base
Base times Height

Answers

Length times width is the right answer

5 x 1/9 x 8
please help

Answers

Answer:

4 4/9

Step-by-step explanation:

PLSSSS HELPPPPPP 20 POINTS



the 180 days of school last year. Grace was absent 15 days . What percent of the days was she absent

Answers

i think the answer is 27%

Expand and simplify:
m(-12-4n+3)​

Answers

Answer:

-9m-4mn

Step-by-step explanation:

1) m(-12-4n+3)​

Rearrange the equation.

2) m(-12+3-4n)​

3) m(-9-4n)​

Cross multiply.

4) -9m-4mn

WILL GIVE BRAINLIEST Help needed asap

Answers

Answer:

3rd option: The number of protons and neutrons

Step-by-step explanation:

Protons are positively charged

Neutrons are negatively charged

You can easily remember this by the P and N

For an object to be "neutral", the protons and neutrons have to be equal. If they are not equal it will be positively charged of negatively charged.

7.8x = 32.76


Show your work

Answers

Answer:

x=4.2

Step-by-step explanation:

7.8x  =   32.76

/7.8          /7.8

x=4.2

Solve the following equation by completing the square. x2-18x+78=0

Answers

The answer is 10.73 btw hope this helps

A restaurant wants to study how well its salads sell. The circle graph shows the sales over the past few days. If 5 of the salads sold were Caesar salads, how many total salads did the restaurant sell?​

Answers

Answer:

20

Step-by-step explanation:

Skill
Figure A is a scale image of figure B.
Area
Figure A
Area
probi
Quiz
Prace
upo
Figure B
Verti
supp
12
2
Figure A maps to figure B with a scale factor of
7
Unit
Test
What is the value of x?

Answers

Answer:

42

Step-by-step explanation:

you have to do 12 ÷2/7 to get the answer

Which data set has a variation, or mean absolute deviation, similar to the data set in the given dot plot

Answers

Answer:

The anwser is C

Step-by-step explanation:

i did the test

HELP DUE IN 60 MINS!


1. Slope of HE =??


2. Slope of GF =??


3. Slope of HG =??


4. Slope of EF =??

Answers

Answer:

Use coordinates of the vertices and the slope formula.

H(-3, 0), E(1, 4), F(3, 2), G(-1, -2)

1. Slope of HE:

m = (4 - 0)/(1 + 3) = 1

2. Slope of GF:

m = (-2 - 2)/(-1 - 3) = 1

3. Slope of HG:

m = (-2 - 0)/(-1 + 3) = -1

4. Slope of EF:

m = (2 - 4)/(3 - 1) = -1

convert 3.34 as a fraction in its simplest form​

Answers

Answer:

3 17/50

Step-by-step explanation:

Help me with Thai math it’s worth 22 points PLZZ answer ALL of them

Answers

Answer:

supply (B)A step in process (A) (b)(A)

Please help I need to turn this in by today

Answers

Answer:

A

Step-by-step explanation:

Answer:

D) F = 9/5C + 32

Step-by-step explanation:


Find the area of this triangle. PLS HELPP!!

Answers

Answer: 152ft squared

Step-by-step explanation:

When solving the area of a triangle you multiply by 1/2 so your equation would be 1/2*16*19 = 152ft squared. (Do not forget your units in other problems!!!)

Yes the answer is 152ft².


use the formula:

A = 1/2bh

substitute:

A= 1/2 x 16 x 19
= 152


Other ways you can put it into your calculator:

• 0.5 x 16 x 19
• 8 x 19 (half the 16)

solve 15=2y - 5 (for homework)

Answers

y=10

2×10=20-5=15

.......

Answer:

y=10

Step-by-step explanation:

15 = 2y - 5

add 5 to both sides

15 + 5 = 2y - 5 + 5

add the numbers

20 = 5y

divide

y = 10

Which of the following terms correctly describe the object below? Check all that apply.

A. Cube B. Polyhedron C. Prism D. Solid E. Pyramid F. Polygon

Answers

Answer:

solid shape

Step-by-step explanation:

4x4+4x3-9x2-x+2 = x-1

Answers

x=6 1/2 or 13/2 or 6.5
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